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I y @uitrit tatto atnt @High l JOSEPH S. FARNSWORTH, OF WINDSOR,VERMONT, ASSIGN OR TO'EBENEZER G. LAB'ISON,PRESIDENT OF- THE WINDSORMANUFACTURING COMPANY.

Letters Patent No. 66,009, dated June 25, 1867.

' INPROVBMENT IN mss rca sWAeINe NND PUNGNING THE JAWS or wNBNcHEs.

the 'tlgnult nfemt tu in ligne ettets rztin mn mating ont nf tti sume.

TO ALL WHOM IT MAY CONCERN:.

' Be it known that I, JosEPH'S. FAnNsivonrH, oi'-Vlindsor,I in thecounty of Windsor, in the State ot' Vermont, have .invented afnew andimproved Mode in the Process of Forging and Siva-ging the Sliding-Jaw ofan Adjustable Screw-Wrench; and 'I do hereby declare that the followingis a full and exact description thereof, reference being had totheaccompanying drawings und to the letters of reference marked thereon.4 V

Figure 1 shows the jaw in perspective, wherein M is a mortise, inconstructing which the solid meta-l is displaced and converted'in'to thearm R, necessary for the screw appliance whereby the jaw is made toslide.

y 4Figure 24 shows a pair of dies'A B, by which the process of forgingis begun, and wherein the outside shape of-the jaw J' is formed. A isthe outline of the upper or striking-die; B that of the anvil or lowerdie. Both are -indicatori by black lines, and represented as in a. stateof rest, after A has been dropped, or otherwise i ilriven'npon B. Thedotted red lines indicate the face of th matrix; the dotted black linesthe shape of the jan', as drivenV therein by the strokeot`- the die A.y' Figure 3 shows 'a pair of dies A' B', indicated by Yblack lines, bywhich the process of forging is continued,

and wherein the punch Pis indicated by red dotted lines in the die. A'is driven into thejaiv J', indicated by black-,dotted lines in the die'B', 'so as partly to displace the metal for the mortise.

' Figure 4 shows a pair of' dies, A" B", in black lines, by whichtheprocess of forging and sii-aging is comy plcted, and wherein Vthepunch P', in red dotted lines, converts the rnetal taken ont of themortise into the arm R', and thejan' J" is left as indicated by theblack dotted-lines in the figure, and as shown iu perspective by i'ig .1t `Vi'hen now, A" falling, has driven punch P' through the jaw, thepunch by the heat of the hot jaw, l enlarges, and the size of mortise,by the cooling of the 'hot iron, contracts, and the consequence is thatthe l jawjs shrunk on tightly to P'. To remedy this, I lift my drop andso lift oi A" from the punch P', and then by a slight stroke of.ahunnnur I loosen P' by driving it down through the hole of B", that holebeing Ina-de l p through B", and P' bingmade tapering for that purpose.l 'The advantages of constructing the mpv-able jaw of an adjustablescrew-wrench by this process of forging i and swaging are numerous,lsome of nihich are: v I First, I am thus able to make the wrench ofWrought Viron or of steel, instead of malleable iron, the usual`materialvfor making such serewwrenches; malleable iron beingcomparatively of little value, so liable is it to break where strengthis required. I f l Second, by this process of forging and swaging, Imake a wrought-iron or 'steel wrench cheaper than the cost'of one madeout of malleable iron, so offering it to the'publie at a. less cost; thefinishing up of a malleable N'vr'ench being more-expensive than that ofwrought iron or steel, and the malleable iron costing more per poundthan wrought iron or steel.

Third, compared with a wrought-iron or steel wrench made by the oldprocess of forging, it is vastly -chapenanfd much better, it* not beingliable to the imperfections arising from the old mode of lapping andWelding.

Fourth, by this process I save all the Vstock taken from the Ainortise,as I'convert the same into the armv in all that variety of adjustablescrew-wrenches having mortise and arm, and I construct the teeth fromthe easel hardened iron or steel jaws, instead of having to insert them,as when the jaws are of malleable iron, in those cases'where I apply myinventionto griping wrenches.

What I claim as my' invention, a-nd desire to secure by Letters `Patent,is-f The combination of dies and punch, constructed and operatingsubstantially as described. Windsor, July 6, 1866.

Witnesses:

HENRY WAnnNnn, Hman' T. Love.

J. s. NARNSWORTH.

